2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Almost completely rewritten by (C) Jeremy Allison 2005 - 2010
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 /* this module apparently provides an implementation of DCE/RPC over a
21 * named pipe (IPC$ connection using SMBtrans). details of DCE/RPC
22 * documentation are available (in on-line form) from the X-Open group.
24 * this module should provide a level of abstraction between SMB
25 * and DCE/RPC, while minimising the amount of mallocs, unnecessary
26 * data copies, and network traffic.
31 #include "system/filesys.h"
32 #include "srv_pipe_internal.h"
33 #include "../librpc/gen_ndr/ndr_schannel.h"
34 #include "../libcli/auth/schannel.h"
35 #include "../libcli/auth/spnego.h"
36 #include "dcesrv_ntlmssp.h"
37 #include "dcesrv_gssapi.h"
38 #include "dcesrv_spnego.h"
39 #include "rpc_server.h"
41 #include "smbd/smbd.h"
44 #include "rpc_server/srv_pipe.h"
45 #include "rpc_server/rpc_contexts.h"
46 #include "lib/param/param.h"
49 #define DBGC_CLASS DBGC_RPC_SRV
52 * Dump everything from the start of the end up of the provided data
53 * into a file, but only at debug level >= 50
55 static void dump_pdu_region(const char *name, int v,
56 DATA_BLOB *data, size_t start, size_t end)
62 if (DEBUGLEVEL < 50) return;
64 if (start > data->length || end > data->length || start > end) return;
66 for (i = 1; i < 100; i++) {
68 fname = talloc_asprintf(talloc_tos(),
72 fname = talloc_asprintf(talloc_tos(),
79 fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
80 if (fd != -1 || errno != EEXIST) break;
83 sz = write(fd, data->data + start, end - start);
85 if ((sz != end - start) || (i != 0) ) {
86 DEBUG(0, ("Error writing/closing %s: %ld!=%ld %d\n",
87 fname, (unsigned long)sz,
88 (unsigned long)end - start, i));
90 DEBUG(0,("created %s\n", fname));
96 static DATA_BLOB generic_session_key(void)
98 return data_blob_const("SystemLibraryDTC", 16);
101 /*******************************************************************
102 Generate the next PDU to be returned from the data.
103 ********************************************************************/
105 static NTSTATUS create_next_packet(TALLOC_CTX *mem_ctx,
106 struct pipe_auth_data *auth,
109 size_t data_sent_length,
113 union dcerpc_payload u;
122 ZERO_STRUCT(u.response);
124 /* Set up rpc packet pfc flags. */
125 if (data_sent_length == 0) {
126 pfc_flags = DCERPC_PFC_FLAG_FIRST;
131 /* Work out how much we can fit in a single PDU. */
132 data_left = rdata->length - data_sent_length;
134 /* Ensure there really is data left to send. */
136 DEBUG(0, ("No data left to send !\n"));
137 return NT_STATUS_BUFFER_TOO_SMALL;
140 status = dcerpc_guess_sizes(auth,
141 DCERPC_RESPONSE_LENGTH,
143 RPC_MAX_PDU_FRAG_LEN,
144 SERVER_NDR_PADDING_SIZE,
145 &data_to_send, &frag_len,
146 &auth_len, &pad_len);
147 if (!NT_STATUS_IS_OK(status)) {
151 /* Set up the alloc hint. This should be the data left to send. */
152 u.response.alloc_hint = data_left;
154 /* Work out if this PDU will be the last. */
155 if (data_sent_length + data_to_send >= rdata->length) {
156 pfc_flags |= DCERPC_PFC_FLAG_LAST;
159 /* Prepare data to be NDR encoded. */
160 u.response.stub_and_verifier =
161 data_blob_const(rdata->data + data_sent_length, data_to_send);
163 /* Store the packet in the data stream. */
164 status = dcerpc_push_ncacn_packet(mem_ctx, DCERPC_PKT_RESPONSE,
165 pfc_flags, auth_len, call_id,
167 if (!NT_STATUS_IS_OK(status)) {
168 DEBUG(0, ("Failed to marshall RPC Packet.\n"));
173 /* Set the proper length on the pdu, including padding.
174 * Only needed if an auth trailer will be appended. */
175 dcerpc_set_frag_length(frag, frag->length
177 + DCERPC_AUTH_TRAILER_LENGTH
182 status = dcerpc_add_auth_footer(auth, pad_len, frag);
183 if (!NT_STATUS_IS_OK(status)) {
184 data_blob_free(frag);
189 *pdu_size = data_to_send;
193 /*******************************************************************
194 Generate the next PDU to be returned from the data in p->rdata.
195 ********************************************************************/
197 bool create_next_pdu(struct pipes_struct *p)
203 * If we're in the fault state, keep returning fault PDU's until
204 * the pipe gets closed. JRA.
206 if (p->fault_state) {
207 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
211 status = create_next_packet(p->mem_ctx, &p->auth,
212 p->call_id, &p->out_data.rdata,
213 p->out_data.data_sent_length,
214 &p->out_data.frag, &pdu_size);
215 if (!NT_STATUS_IS_OK(status)) {
216 DEBUG(0, ("Failed to create packet with error %s, "
217 "(auth level %u / type %u)\n",
219 (unsigned int)p->auth.auth_level,
220 (unsigned int)p->auth.auth_type));
224 /* Setup the counts for this PDU. */
225 p->out_data.data_sent_length += pdu_size;
226 p->out_data.current_pdu_sent = 0;
231 static bool pipe_init_outgoing_data(struct pipes_struct *p);
233 /*******************************************************************
234 Marshall a bind_nak pdu.
235 *******************************************************************/
237 static bool setup_bind_nak(struct pipes_struct *p, struct ncacn_packet *pkt)
240 union dcerpc_payload u;
242 /* Free any memory in the current return data buffer. */
243 pipe_init_outgoing_data(p);
246 * Initialize a bind_nak header.
251 u.bind_nak.reject_reason = 0;
254 * Marshall directly into the outgoing PDU space. We
255 * must do this as we need to set to the bind response
256 * header and are never sending more than one PDU here.
259 status = dcerpc_push_ncacn_packet(p->mem_ctx,
261 DCERPC_PFC_FLAG_FIRST |
262 DCERPC_PFC_FLAG_LAST,
267 if (!NT_STATUS_IS_OK(status)) {
271 p->out_data.data_sent_length = 0;
272 p->out_data.current_pdu_sent = 0;
274 TALLOC_FREE(p->auth.auth_ctx);
275 p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
276 p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
277 p->pipe_bound = False;
282 /*******************************************************************
283 Marshall a fault pdu.
284 *******************************************************************/
286 bool setup_fault_pdu(struct pipes_struct *p, NTSTATUS fault_status)
289 union dcerpc_payload u;
291 /* Free any memory in the current return data buffer. */
292 pipe_init_outgoing_data(p);
295 * Initialize a fault header.
300 u.fault.status = NT_STATUS_V(fault_status);
301 u.fault._pad = data_blob_talloc_zero(p->mem_ctx, 4);
304 * Marshall directly into the outgoing PDU space. We
305 * must do this as we need to set to the bind response
306 * header and are never sending more than one PDU here.
309 status = dcerpc_push_ncacn_packet(p->mem_ctx,
311 DCERPC_PFC_FLAG_FIRST |
312 DCERPC_PFC_FLAG_LAST |
313 DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
318 if (!NT_STATUS_IS_OK(status)) {
322 p->out_data.data_sent_length = 0;
323 p->out_data.current_pdu_sent = 0;
328 /*******************************************************************
329 Ensure a bind request has the correct abstract & transfer interface.
330 Used to reject unknown binds from Win2k.
331 *******************************************************************/
333 static bool check_bind_req(struct pipes_struct *p,
334 struct ndr_syntax_id* abstract,
335 struct ndr_syntax_id* transfer,
338 struct pipe_rpc_fns *context_fns;
341 DEBUG(3,("check_bind_req for %s\n",
342 get_pipe_name_from_syntax(talloc_tos(), abstract)));
344 /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
345 if (rpc_srv_pipe_exists_by_id(abstract) &&
346 ndr_syntax_id_equal(transfer, &ndr_transfer_syntax)) {
347 DEBUG(3, ("check_bind_req: %s -> %s rpc service\n",
348 rpc_srv_get_pipe_cli_name(abstract),
349 rpc_srv_get_pipe_srv_name(abstract)));
354 ok = init_pipe_handles(p, abstract);
356 DEBUG(1, ("Failed to init pipe handles!\n"));
360 context_fns = talloc(p, struct pipe_rpc_fns);
361 if (context_fns == NULL) {
362 DEBUG(0,("check_bind_req: talloc() failed!\n"));
366 context_fns->next = context_fns->prev = NULL;
367 context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(abstract);
368 context_fns->cmds = rpc_srv_get_pipe_cmds(abstract);
369 context_fns->context_id = context_id;
370 context_fns->syntax = *abstract;
372 /* add to the list of open contexts */
374 DLIST_ADD( p->contexts, context_fns );
380 * Is a named pipe known?
381 * @param[in] cli_filename The pipe name requested by the client
382 * @result Do we want to serve this?
384 bool is_known_pipename(const char *cli_filename, struct ndr_syntax_id *syntax)
386 const char *pipename = cli_filename;
389 if (strnequal(pipename, "\\PIPE\\", 6)) {
393 if (*pipename == '\\') {
397 if (lp_disable_spoolss() && strequal(pipename, "spoolss")) {
398 DEBUG(10, ("refusing spoolss access\n"));
402 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
406 status = smb_probe_module("rpc", pipename);
407 if (!NT_STATUS_IS_OK(status)) {
408 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
411 DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename));
414 * Scan the list again for the interface id
416 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
420 DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
426 /*******************************************************************
427 Handle the first part of a SPNEGO bind auth.
428 *******************************************************************/
430 static bool pipe_spnego_auth_bind(struct pipes_struct *p,
432 struct dcerpc_auth *auth_info,
435 struct spnego_context *spnego_ctx;
438 status = spnego_server_auth_start(p,
439 (auth_info->auth_level ==
440 DCERPC_AUTH_LEVEL_INTEGRITY),
441 (auth_info->auth_level ==
442 DCERPC_AUTH_LEVEL_PRIVACY),
444 &auth_info->credentials,
448 if (!NT_STATUS_IS_OK(status)) {
449 DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
454 /* Make sure data is bound to the memctx, to be freed the caller */
455 talloc_steal(mem_ctx, response->data);
457 p->auth.auth_ctx = spnego_ctx;
458 p->auth.auth_type = DCERPC_AUTH_TYPE_SPNEGO;
460 DEBUG(10, ("SPNEGO auth started\n"));
465 /*******************************************************************
466 Handle an schannel bind auth.
467 *******************************************************************/
469 static bool pipe_schannel_auth_bind(struct pipes_struct *p,
471 struct dcerpc_auth *auth_info,
474 struct NL_AUTH_MESSAGE neg;
475 struct NL_AUTH_MESSAGE reply;
478 struct netlogon_creds_CredentialState *creds;
479 enum ndr_err_code ndr_err;
480 struct schannel_state *schannel_auth;
481 struct loadparm_context *lp_ctx;
483 ndr_err = ndr_pull_struct_blob(
484 &auth_info->credentials, mem_ctx, &neg,
485 (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
486 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
487 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
491 if (DEBUGLEVEL >= 10) {
492 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &neg);
495 if (!(neg.Flags & NL_FLAG_OEM_NETBIOS_COMPUTER_NAME)) {
496 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
500 lp_ctx = loadparm_init_s3(p, loadparm_s3_context());
502 DEBUG(0,("pipe_schannel_auth_bind: loadparm_init_s3() failed!\n"));
507 * The neg.oem_netbios_computer.a key here must match the remote computer name
508 * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
509 * operations that use credentials.
513 status = schannel_get_creds_state(p, lp_ctx,
514 neg.oem_netbios_computer.a, &creds);
517 talloc_unlink(p, lp_ctx);
518 if (!NT_STATUS_IS_OK(status)) {
519 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
523 schannel_auth = talloc(p, struct schannel_state);
524 if (!schannel_auth) {
529 schannel_auth->state = SCHANNEL_STATE_START;
530 schannel_auth->seq_num = 0;
531 schannel_auth->initiator = false;
532 schannel_auth->creds = creds;
535 * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
536 * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
537 * struct of the person who opened the pipe. I need to test this further. JRA.
539 * VL. As we are mapping this to guest set the generic key
540 * "SystemLibraryDTC" key here. It's a bit difficult to test against
541 * W2k3, as it does not allow schannel binds against SAMR and LSA
545 ret = session_info_set_session_key(p->session_info, generic_session_key());
548 DEBUG(0, ("session_info_set_session_key failed\n"));
552 /*** SCHANNEL verifier ***/
554 reply.MessageType = NL_NEGOTIATE_RESPONSE;
556 reply.Buffer.dummy = 5; /* ??? actually I don't think
557 * this has any meaning
560 ndr_err = ndr_push_struct_blob(response, mem_ctx, &reply,
561 (ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE);
562 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
563 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
567 if (DEBUGLEVEL >= 10) {
568 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &reply);
571 DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
572 neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
574 /* We're finished with this bind - no more packets. */
575 p->auth.auth_ctx = schannel_auth;
576 p->auth.auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
578 p->pipe_bound = True;
583 /*******************************************************************
584 Handle an NTLMSSP bind auth.
585 *******************************************************************/
587 static bool pipe_ntlmssp_auth_bind(struct pipes_struct *p,
589 struct dcerpc_auth *auth_info,
592 struct gensec_security *gensec_security = NULL;
595 if (strncmp((char *)auth_info->credentials.data, "NTLMSSP", 7) != 0) {
596 DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
600 /* We have an NTLMSSP blob. */
601 status = ntlmssp_server_auth_start(p,
602 (auth_info->auth_level ==
603 DCERPC_AUTH_LEVEL_INTEGRITY),
604 (auth_info->auth_level ==
605 DCERPC_AUTH_LEVEL_PRIVACY),
607 &auth_info->credentials,
611 if (!NT_STATUS_EQUAL(status, NT_STATUS_OK)) {
612 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
617 /* Make sure data is bound to the memctx, to be freed the caller */
618 talloc_steal(mem_ctx, response->data);
620 p->auth.auth_ctx = gensec_security;
621 p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
623 DEBUG(10, (__location__ ": NTLMSSP auth started\n"));
628 /*******************************************************************
629 Process an NTLMSSP authentication response.
630 If this function succeeds, the user has been authenticated
631 and their domain, name and calling workstation stored in
633 *******************************************************************/
635 static bool pipe_ntlmssp_verify_final(TALLOC_CTX *mem_ctx,
636 struct gensec_security *gensec_security,
637 enum dcerpc_AuthLevel auth_level,
638 struct auth_session_info **session_info)
643 DEBUG(5, (__location__ ": checking user details\n"));
645 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
646 ensure the underlying NTLMSSP flags are also set. If not we should
649 status = ntlmssp_server_check_flags(gensec_security,
651 DCERPC_AUTH_LEVEL_INTEGRITY),
653 DCERPC_AUTH_LEVEL_PRIVACY));
654 if (!NT_STATUS_IS_OK(status)) {
655 DEBUG(0, (__location__ ": Client failed to negotatie proper "
656 "security for rpc connection\n"));
660 TALLOC_FREE(*session_info);
662 status = ntlmssp_server_get_user_info(gensec_security,
663 mem_ctx, session_info);
664 if (!NT_STATUS_IS_OK(status)) {
665 DEBUG(0, (__location__ ": failed to obtain the server info "
666 "for authenticated user: %s\n", nt_errstr(status)));
670 if ((*session_info)->security_token == NULL) {
671 DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
676 * We're an authenticated bind over smb, so the session key needs to
677 * be set to "SystemLibraryDTC". Weird, but this is what Windows
678 * does. See the RPC-SAMBA3SESSIONKEY.
681 ret = session_info_set_session_key((*session_info), generic_session_key());
683 DEBUG(0, ("Failed to set session key!\n"));
690 /*******************************************************************
691 Handle a GSSAPI bind auth.
692 *******************************************************************/
694 static bool pipe_gssapi_auth_bind(struct pipes_struct *p,
696 struct dcerpc_auth *auth_info,
700 struct gse_context *gse_ctx = NULL;
702 status = gssapi_server_auth_start(p,
703 (auth_info->auth_level ==
704 DCERPC_AUTH_LEVEL_INTEGRITY),
705 (auth_info->auth_level ==
706 DCERPC_AUTH_LEVEL_PRIVACY),
708 &auth_info->credentials,
711 if (!NT_STATUS_IS_OK(status)) {
712 DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n",
717 /* Make sure data is bound to the memctx, to be freed the caller */
718 talloc_steal(mem_ctx, response->data);
720 p->auth.auth_ctx = gse_ctx;
721 p->auth.auth_type = DCERPC_AUTH_TYPE_KRB5;
723 DEBUG(10, ("KRB5 auth started\n"));
728 TALLOC_FREE(gse_ctx);
732 static NTSTATUS pipe_gssapi_verify_final(TALLOC_CTX *mem_ctx,
733 struct gse_context *gse_ctx,
734 const struct tsocket_address *remote_address,
735 struct auth_session_info **session_info)
740 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
741 ensure the underlying flags are also set. If not we should
744 status = gssapi_server_check_flags(gse_ctx);
745 if (!NT_STATUS_IS_OK(status)) {
746 DEBUG(0, ("Requested Security Layers not honored!\n"));
750 status = gssapi_server_get_user_info(gse_ctx, mem_ctx,
751 remote_address, session_info);
752 if (!NT_STATUS_IS_OK(status)) {
753 DEBUG(0, (__location__ ": failed to obtain the server info "
754 "for authenticated user: %s\n", nt_errstr(status)));
759 * We're an authenticated bind over smb, so the session key needs to
760 * be set to "SystemLibraryDTC". Weird, but this is what Windows
761 * does. See the RPC-SAMBA3SESSIONKEY.
764 bret = session_info_set_session_key((*session_info), generic_session_key());
766 return NT_STATUS_ACCESS_DENIED;
772 static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p)
774 enum spnego_mech auth_type;
775 struct gensec_security *gensec_security;
776 struct spnego_context *spnego_ctx;
777 struct gse_context *gse_ctx;
781 switch (p->auth.auth_type) {
782 case DCERPC_AUTH_TYPE_NTLMSSP:
783 gensec_security = talloc_get_type_abort(p->auth.auth_ctx,
784 struct gensec_security);
785 if (!pipe_ntlmssp_verify_final(p, gensec_security,
788 return NT_STATUS_ACCESS_DENIED;
791 case DCERPC_AUTH_TYPE_KRB5:
792 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
794 status = pipe_gssapi_verify_final(p, gse_ctx,
797 if (!NT_STATUS_IS_OK(status)) {
798 DEBUG(1, ("gssapi bind failed with: %s",
803 case DCERPC_AUTH_TYPE_SPNEGO:
804 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
805 struct spnego_context);
806 status = spnego_get_negotiated_mech(spnego_ctx,
807 &auth_type, &mech_ctx);
808 if (!NT_STATUS_IS_OK(status)) {
809 DEBUG(0, ("Bad SPNEGO state (%s)\n",
815 gse_ctx = talloc_get_type_abort(mech_ctx,
817 status = pipe_gssapi_verify_final(p, gse_ctx,
820 if (!NT_STATUS_IS_OK(status)) {
821 DEBUG(1, ("gssapi bind failed with: %s",
827 gensec_security = talloc_get_type_abort(mech_ctx,
828 struct gensec_security);
829 if (!pipe_ntlmssp_verify_final(p, gensec_security,
832 return NT_STATUS_ACCESS_DENIED;
836 DEBUG(0, (__location__ ": incorrect spnego type "
837 "(%d).\n", auth_type));
838 return NT_STATUS_ACCESS_DENIED;
842 DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
843 (unsigned int)p->auth.auth_type));
844 return NT_STATUS_ACCESS_DENIED;
847 p->pipe_bound = true;
852 /*******************************************************************
853 Respond to a pipe bind request.
854 *******************************************************************/
856 static bool api_pipe_bind_req(struct pipes_struct *p,
857 struct ncacn_packet *pkt)
859 struct dcerpc_auth auth_info;
861 unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
863 struct ndr_syntax_id id;
864 union dcerpc_payload u;
865 struct dcerpc_ack_ctx bind_ack_ctx;
866 DATA_BLOB auth_resp = data_blob_null;
867 DATA_BLOB auth_blob = data_blob_null;
869 /* No rebinds on a bound pipe - use alter context. */
871 DEBUG(2,("Rejecting bind request on bound rpc connection\n"));
872 return setup_bind_nak(p, pkt);
875 if (pkt->u.bind.num_contexts == 0) {
876 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
881 * Try and find the correct pipe name to ensure
882 * that this is a pipe name we support.
884 id = pkt->u.bind.ctx_list[0].abstract_syntax;
885 if (rpc_srv_pipe_exists_by_id(&id)) {
886 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
887 rpc_srv_get_pipe_cli_name(&id),
888 rpc_srv_get_pipe_srv_name(&id)));
890 status = smb_probe_module(
891 "rpc", get_pipe_name_from_syntax(
895 if (NT_STATUS_IS_ERR(status)) {
896 DEBUG(3,("api_pipe_bind_req: Unknown rpc service name "
897 "%s in bind request.\n",
898 get_pipe_name_from_syntax(talloc_tos(), &id)));
900 return setup_bind_nak(p, pkt);
903 if (rpc_srv_get_pipe_interface_by_cli_name(
904 get_pipe_name_from_syntax(talloc_tos(),
907 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
908 rpc_srv_get_pipe_cli_name(&id),
909 rpc_srv_get_pipe_srv_name(&id)));
911 DEBUG(0, ("module %s doesn't provide functions for "
913 get_pipe_name_from_syntax(talloc_tos(), &id),
914 get_pipe_name_from_syntax(talloc_tos(), &id)));
915 return setup_bind_nak(p, pkt);
919 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
921 if (pkt->u.bind.assoc_group_id != 0) {
922 assoc_gid = pkt->u.bind.assoc_group_id;
928 * Create the bind response struct.
931 /* If the requested abstract synt uuid doesn't match our client pipe,
932 reject the bind_ack & set the transfer interface synt to all 0's,
933 ver 0 (observed when NT5 attempts to bind to abstract interfaces
935 Needed when adding entries to a DACL from NT5 - SK */
937 if (check_bind_req(p,
938 &pkt->u.bind.ctx_list[0].abstract_syntax,
939 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
940 pkt->u.bind.ctx_list[0].context_id)) {
942 bind_ack_ctx.result = 0;
943 bind_ack_ctx.reason = 0;
944 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
946 p->pipe_bound = False;
947 /* Rejection reason: abstract syntax not supported */
948 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
949 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
950 bind_ack_ctx.syntax = null_ndr_syntax_id;
954 * Check if this is an authenticated bind request.
956 if (pkt->auth_length) {
957 /* Quick length check. Won't catch a bad auth footer,
958 * prevents overrun. */
960 if (pkt->frag_length < RPC_HEADER_LEN +
961 DCERPC_AUTH_TRAILER_LENGTH +
963 DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
964 "too long for fragment %u.\n",
965 (unsigned int)pkt->auth_length,
966 (unsigned int)pkt->frag_length));
971 * Decode the authentication verifier.
973 status = dcerpc_pull_dcerpc_auth(pkt,
974 &pkt->u.bind.auth_info,
975 &auth_info, p->endian);
976 if (!NT_STATUS_IS_OK(status)) {
977 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
981 auth_type = auth_info.auth_type;
983 /* Work out if we have to sign or seal etc. */
984 switch (auth_info.auth_level) {
985 case DCERPC_AUTH_LEVEL_INTEGRITY:
986 p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
988 case DCERPC_AUTH_LEVEL_PRIVACY:
989 p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
991 case DCERPC_AUTH_LEVEL_CONNECT:
992 p->auth.auth_level = DCERPC_AUTH_LEVEL_CONNECT;
995 DEBUG(0, ("Unexpected auth level (%u).\n",
996 (unsigned int)auth_info.auth_level ));
1000 switch (auth_type) {
1001 case DCERPC_AUTH_TYPE_NTLMSSP:
1002 if (!pipe_ntlmssp_auth_bind(p, pkt,
1003 &auth_info, &auth_resp)) {
1009 case DCERPC_AUTH_TYPE_SCHANNEL:
1010 if (!pipe_schannel_auth_bind(p, pkt,
1011 &auth_info, &auth_resp)) {
1016 case DCERPC_AUTH_TYPE_SPNEGO:
1017 if (!pipe_spnego_auth_bind(p, pkt,
1018 &auth_info, &auth_resp)) {
1023 case DCERPC_AUTH_TYPE_KRB5:
1024 if (!pipe_gssapi_auth_bind(p, pkt,
1025 &auth_info, &auth_resp)) {
1030 case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1031 if (p->transport == NCALRPC && p->ncalrpc_as_system) {
1032 TALLOC_FREE(p->session_info);
1034 status = make_session_info_system(p,
1036 if (!NT_STATUS_IS_OK(status)) {
1040 auth_resp = data_blob_talloc(pkt,
1044 p->auth.auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
1045 p->pipe_bound = true;
1051 case DCERPC_AUTH_TYPE_NONE:
1055 DEBUG(0, ("Unknown auth type %x requested.\n", auth_type));
1060 if (auth_type == DCERPC_AUTH_TYPE_NONE) {
1061 /* Unauthenticated bind request. */
1062 /* We're finished - no more packets. */
1063 p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
1064 /* We must set the pipe auth_level here also. */
1065 p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
1066 p->pipe_bound = True;
1067 /* The session key was initialized from the SMB
1068 * session in make_internal_rpc_pipe_p */
1071 ZERO_STRUCT(u.bind_ack);
1072 u.bind_ack.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1073 u.bind_ack.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1074 u.bind_ack.assoc_group_id = assoc_gid;
1076 /* name has to be \PIPE\xxxxx */
1077 u.bind_ack.secondary_address =
1078 talloc_asprintf(pkt, "\\PIPE\\%s",
1079 rpc_srv_get_pipe_srv_name(&id));
1080 if (!u.bind_ack.secondary_address) {
1081 DEBUG(0, ("Out of memory!\n"));
1084 u.bind_ack.secondary_address_size =
1085 strlen(u.bind_ack.secondary_address) + 1;
1087 u.bind_ack.num_results = 1;
1088 u.bind_ack.ctx_list = &bind_ack_ctx;
1090 /* NOTE: We leave the auth_info empty so we can calculate the padding
1091 * later and then append the auth_info --simo */
1094 * Marshall directly into the outgoing PDU space. We
1095 * must do this as we need to set to the bind response
1096 * header and are never sending more than one PDU here.
1099 status = dcerpc_push_ncacn_packet(p->mem_ctx,
1100 DCERPC_PKT_BIND_ACK,
1101 DCERPC_PFC_FLAG_FIRST |
1102 DCERPC_PFC_FLAG_LAST,
1107 if (!NT_STATUS_IS_OK(status)) {
1108 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1109 nt_errstr(status)));
1112 if (auth_resp.length) {
1114 status = dcerpc_push_dcerpc_auth(pkt,
1116 auth_info.auth_level,
1118 1, /* auth_context_id */
1121 if (!NT_STATUS_IS_OK(status)) {
1122 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1127 /* Now that we have the auth len store it into the right place in
1128 * the dcerpc header */
1129 dcerpc_set_frag_length(&p->out_data.frag,
1130 p->out_data.frag.length + auth_blob.length);
1132 if (auth_blob.length) {
1134 if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
1135 auth_blob.data, auth_blob.length)) {
1136 DEBUG(0, ("Append of auth info failed.\n"));
1142 * Setup the lengths for the initial reply.
1145 p->out_data.data_sent_length = 0;
1146 p->out_data.current_pdu_sent = 0;
1148 TALLOC_FREE(auth_blob.data);
1153 data_blob_free(&p->out_data.frag);
1154 TALLOC_FREE(auth_blob.data);
1155 return setup_bind_nak(p, pkt);
1158 /*******************************************************************
1159 This is the "stage3" response after a bind request and reply.
1160 *******************************************************************/
1162 bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
1164 struct dcerpc_auth auth_info;
1165 DATA_BLOB response = data_blob_null;
1166 struct gensec_security *gensec_security;
1167 struct spnego_context *spnego_ctx;
1168 struct gse_context *gse_ctx;
1171 DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
1173 if (pkt->auth_length == 0) {
1174 DEBUG(0, ("No auth field sent for bind request!\n"));
1178 /* Ensure there's enough data for an authenticated request. */
1179 if (pkt->frag_length < RPC_HEADER_LEN
1180 + DCERPC_AUTH_TRAILER_LENGTH
1181 + pkt->auth_length) {
1182 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
1183 "%u is too large.\n",
1184 (unsigned int)pkt->auth_length));
1189 * Decode the authentication verifier response.
1192 status = dcerpc_pull_dcerpc_auth(pkt,
1193 &pkt->u.auth3.auth_info,
1194 &auth_info, p->endian);
1195 if (!NT_STATUS_IS_OK(status)) {
1196 DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
1200 /* We must NEVER look at auth_info->auth_pad_len here,
1201 * as old Samba client code gets it wrong and sends it
1205 if (auth_info.auth_type != p->auth.auth_type) {
1206 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1207 "but auth was started as type %d!\n",
1208 auth_info.auth_type, p->auth.auth_type));
1212 switch (auth_info.auth_type) {
1213 case DCERPC_AUTH_TYPE_NTLMSSP:
1214 gensec_security = talloc_get_type_abort(p->auth.auth_ctx,
1215 struct gensec_security);
1216 status = ntlmssp_server_step(gensec_security,
1217 pkt, &auth_info.credentials,
1220 case DCERPC_AUTH_TYPE_KRB5:
1221 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1222 struct gse_context);
1223 status = gssapi_server_step(gse_ctx,
1224 pkt, &auth_info.credentials,
1227 case DCERPC_AUTH_TYPE_SPNEGO:
1228 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1229 struct spnego_context);
1230 status = spnego_server_step(spnego_ctx,
1231 pkt, &auth_info.credentials,
1235 DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
1236 (unsigned int)auth_info.auth_type));
1240 if (NT_STATUS_EQUAL(status,
1241 NT_STATUS_MORE_PROCESSING_REQUIRED) ||
1243 DEBUG(0, (__location__ ": This was supposed to be the final "
1244 "leg, but crypto machinery claims a response is "
1245 "needed, aborting auth!\n"));
1246 data_blob_free(&response);
1249 if (!NT_STATUS_IS_OK(status)) {
1250 DEBUG(0, ("Auth failed (%s)\n", nt_errstr(status)));
1254 /* Now verify auth was indeed successful and extract server info */
1255 status = pipe_auth_verify_final(p);
1256 if (!NT_STATUS_IS_OK(status)) {
1257 DEBUG(0, ("Auth Verify failed (%s)\n", nt_errstr(status)));
1265 TALLOC_FREE(p->auth.auth_ctx);
1269 /****************************************************************************
1270 Deal with an alter context call. Can be third part of 3 leg auth request for
1272 ****************************************************************************/
1274 static bool api_pipe_alter_context(struct pipes_struct *p,
1275 struct ncacn_packet *pkt)
1277 struct dcerpc_auth auth_info;
1280 union dcerpc_payload u;
1281 struct dcerpc_ack_ctx bind_ack_ctx;
1282 DATA_BLOB auth_resp = data_blob_null;
1283 DATA_BLOB auth_blob = data_blob_null;
1285 struct gensec_security *gensec_security;
1286 struct spnego_context *spnego_ctx;
1287 struct gse_context *gse_ctx;
1289 DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
1291 if (pkt->u.bind.assoc_group_id != 0) {
1292 assoc_gid = pkt->u.bind.assoc_group_id;
1298 * Create the bind response struct.
1301 /* If the requested abstract synt uuid doesn't match our client pipe,
1302 reject the bind_ack & set the transfer interface synt to all 0's,
1303 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1305 Needed when adding entries to a DACL from NT5 - SK */
1307 if (check_bind_req(p,
1308 &pkt->u.bind.ctx_list[0].abstract_syntax,
1309 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
1310 pkt->u.bind.ctx_list[0].context_id)) {
1312 bind_ack_ctx.result = 0;
1313 bind_ack_ctx.reason = 0;
1314 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
1316 p->pipe_bound = False;
1317 /* Rejection reason: abstract syntax not supported */
1318 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
1319 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
1320 bind_ack_ctx.syntax = null_ndr_syntax_id;
1324 * Check if this is an authenticated alter context request.
1326 if (pkt->auth_length) {
1327 /* Quick length check. Won't catch a bad auth footer,
1328 * prevents overrun. */
1330 if (pkt->frag_length < RPC_HEADER_LEN +
1331 DCERPC_AUTH_TRAILER_LENGTH +
1333 DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
1334 "too long for fragment %u.\n",
1335 (unsigned int)pkt->auth_length,
1336 (unsigned int)pkt->frag_length ));
1340 status = dcerpc_pull_dcerpc_auth(pkt,
1341 &pkt->u.bind.auth_info,
1342 &auth_info, p->endian);
1343 if (!NT_STATUS_IS_OK(status)) {
1344 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1348 /* We can only finish if the pipe is unbound for now */
1349 if (p->pipe_bound) {
1350 DEBUG(0, (__location__ ": Pipe already bound, "
1351 "Altering Context not yet supported!\n"));
1355 if (auth_info.auth_type != p->auth.auth_type) {
1356 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1357 "but auth was started as type %d!\n",
1358 auth_info.auth_type, p->auth.auth_type));
1363 switch (auth_info.auth_type) {
1364 case DCERPC_AUTH_TYPE_SPNEGO:
1365 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1366 struct spnego_context);
1367 status = spnego_server_step(spnego_ctx,
1369 &auth_info.credentials,
1373 case DCERPC_AUTH_TYPE_KRB5:
1374 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1375 struct gse_context);
1376 status = gssapi_server_step(gse_ctx,
1378 &auth_info.credentials,
1381 case DCERPC_AUTH_TYPE_NTLMSSP:
1382 gensec_security = talloc_get_type_abort(p->auth.auth_ctx,
1383 struct gensec_security);
1384 status = ntlmssp_server_step(gensec_security,
1386 &auth_info.credentials,
1391 DEBUG(3, (__location__ ": Usupported auth type (%d) "
1392 "in alter-context call\n",
1393 auth_info.auth_type));
1397 if (NT_STATUS_IS_OK(status)) {
1398 /* third leg of auth, verify auth info */
1399 status = pipe_auth_verify_final(p);
1400 if (!NT_STATUS_IS_OK(status)) {
1401 DEBUG(0, ("Auth Verify failed (%s)\n",
1402 nt_errstr(status)));
1405 } else if (NT_STATUS_EQUAL(status,
1406 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1407 DEBUG(10, ("More auth legs required.\n"));
1409 DEBUG(0, ("Auth step returned an error (%s)\n",
1410 nt_errstr(status)));
1415 ZERO_STRUCT(u.alter_resp);
1416 u.alter_resp.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1417 u.alter_resp.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1418 u.alter_resp.assoc_group_id = assoc_gid;
1420 /* secondary address CAN be NULL
1421 * as the specs say it's ignored.
1422 * It MUST be NULL to have the spoolss working.
1424 u.alter_resp.secondary_address = "";
1425 u.alter_resp.secondary_address_size = 1;
1427 u.alter_resp.num_results = 1;
1428 u.alter_resp.ctx_list = &bind_ack_ctx;
1430 /* NOTE: We leave the auth_info empty so we can calculate the padding
1431 * later and then append the auth_info --simo */
1434 * Marshall directly into the outgoing PDU space. We
1435 * must do this as we need to set to the bind response
1436 * header and are never sending more than one PDU here.
1439 status = dcerpc_push_ncacn_packet(p->mem_ctx,
1440 DCERPC_PKT_ALTER_RESP,
1441 DCERPC_PFC_FLAG_FIRST |
1442 DCERPC_PFC_FLAG_LAST,
1447 if (!NT_STATUS_IS_OK(status)) {
1448 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1449 nt_errstr(status)));
1452 if (auth_resp.length) {
1454 /* Work out any padding needed before the auth footer. */
1455 pad_len = p->out_data.frag.length % SERVER_NDR_PADDING_SIZE;
1457 pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
1458 DEBUG(10, ("auth pad_len = %u\n",
1459 (unsigned int)pad_len));
1462 status = dcerpc_push_dcerpc_auth(pkt,
1463 auth_info.auth_type,
1464 auth_info.auth_level,
1466 1, /* auth_context_id */
1469 if (!NT_STATUS_IS_OK(status)) {
1470 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1475 /* Now that we have the auth len store it into the right place in
1476 * the dcerpc header */
1477 dcerpc_set_frag_length(&p->out_data.frag,
1478 p->out_data.frag.length +
1479 pad_len + auth_blob.length);
1481 if (auth_resp.length) {
1483 char pad[SERVER_NDR_PADDING_SIZE];
1484 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
1485 if (!data_blob_append(p->mem_ctx,
1488 DEBUG(0, ("api_pipe_bind_req: failed to add "
1489 "%u bytes of pad data.\n",
1490 (unsigned int)pad_len));
1495 if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
1496 auth_blob.data, auth_blob.length)) {
1497 DEBUG(0, ("Append of auth info failed.\n"));
1503 * Setup the lengths for the initial reply.
1506 p->out_data.data_sent_length = 0;
1507 p->out_data.current_pdu_sent = 0;
1509 TALLOC_FREE(auth_blob.data);
1514 data_blob_free(&p->out_data.frag);
1515 TALLOC_FREE(auth_blob.data);
1516 return setup_bind_nak(p, pkt);
1519 static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
1520 const struct api_struct *api_rpc_cmds, int n_cmds,
1521 const struct ndr_syntax_id *syntax);
1523 /****************************************************************************
1524 Find the correct RPC function to call for this request.
1525 If the pipe is authenticated then become the correct UNIX user
1526 before doing the call.
1527 ****************************************************************************/
1529 static bool api_pipe_request(struct pipes_struct *p,
1530 struct ncacn_packet *pkt)
1533 struct pipe_rpc_fns *pipe_fns;
1535 if (!p->pipe_bound) {
1536 DEBUG(1, ("Pipe not bound!\n"));
1537 data_blob_free(&p->out_data.rdata);
1541 if (!become_authenticated_pipe_user(p->session_info)) {
1542 DEBUG(1, ("Failed to become pipe user!\n"));
1543 data_blob_free(&p->out_data.rdata);
1547 /* get the set of RPC functions for this context */
1549 pipe_fns = find_pipe_fns_by_context(p->contexts,
1550 pkt->u.request.context_id);
1553 TALLOC_CTX *frame = talloc_stackframe();
1555 DEBUG(5, ("Requested %s rpc service\n",
1556 get_pipe_name_from_syntax(talloc_tos(), &pipe_fns->syntax)));
1558 ret = api_rpcTNP(p, pkt, pipe_fns->cmds, pipe_fns->n_cmds,
1564 DEBUG(0, ("No rpc function table associated with context "
1566 pkt->u.request.context_id));
1569 unbecome_authenticated_pipe_user();
1574 /*******************************************************************
1575 Calls the underlying RPC function for a named pipe.
1576 ********************************************************************/
1578 static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
1579 const struct api_struct *api_rpc_cmds, int n_cmds,
1580 const struct ndr_syntax_id *syntax)
1585 /* interpret the command */
1586 DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
1587 get_pipe_name_from_syntax(talloc_tos(), syntax),
1588 pkt->u.request.opnum));
1590 if (DEBUGLEVEL >= 50) {
1592 slprintf(name, sizeof(name)-1, "in_%s",
1593 get_pipe_name_from_syntax(talloc_tos(), syntax));
1594 dump_pdu_region(name, pkt->u.request.opnum,
1595 &p->in_data.data, 0,
1596 p->in_data.data.length);
1599 for (fn_num = 0; fn_num < n_cmds; fn_num++) {
1600 if (api_rpc_cmds[fn_num].opnum == pkt->u.request.opnum &&
1601 api_rpc_cmds[fn_num].fn != NULL) {
1602 DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
1603 api_rpc_cmds[fn_num].name));
1608 if (fn_num == n_cmds) {
1610 * For an unknown RPC just return a fault PDU but
1611 * return True to allow RPC's on the pipe to continue
1612 * and not put the pipe into fault state. JRA.
1614 DEBUG(4, ("unknown\n"));
1615 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
1619 offset1 = p->out_data.rdata.length;
1621 DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
1622 fn_num, api_rpc_cmds[fn_num].fn));
1623 /* do the actual command */
1624 if(!api_rpc_cmds[fn_num].fn(p)) {
1625 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
1626 get_pipe_name_from_syntax(talloc_tos(), syntax),
1627 api_rpc_cmds[fn_num].name));
1628 data_blob_free(&p->out_data.rdata);
1632 if (p->bad_handle_fault_state) {
1633 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
1634 p->bad_handle_fault_state = False;
1635 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH));
1639 if (p->rng_fault_state) {
1640 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
1641 p->rng_fault_state = False;
1642 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
1646 if (DEBUGLEVEL >= 50) {
1648 slprintf(name, sizeof(name)-1, "out_%s",
1649 get_pipe_name_from_syntax(talloc_tos(), syntax));
1650 dump_pdu_region(name, pkt->u.request.opnum,
1651 &p->out_data.rdata, offset1,
1652 p->out_data.rdata.length);
1655 DEBUG(5,("api_rpcTNP: called %s successfully\n",
1656 get_pipe_name_from_syntax(talloc_tos(), syntax)));
1658 /* Check for buffer underflow in rpc parsing */
1659 if ((DEBUGLEVEL >= 10) &&
1660 (pkt->frag_length < p->in_data.data.length)) {
1661 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
1662 dump_data(10, p->in_data.data.data + pkt->frag_length,
1663 p->in_data.data.length - pkt->frag_length);
1669 /****************************************************************************
1670 Initialise an outgoing packet.
1671 ****************************************************************************/
1673 static bool pipe_init_outgoing_data(struct pipes_struct *p)
1675 output_data *o_data = &p->out_data;
1677 /* Reset the offset counters. */
1678 o_data->data_sent_length = 0;
1679 o_data->current_pdu_sent = 0;
1681 data_blob_free(&o_data->frag);
1683 /* Free any memory in the current return data buffer. */
1684 data_blob_free(&o_data->rdata);
1689 /****************************************************************************
1690 Sets the fault state on incoming packets.
1691 ****************************************************************************/
1693 void set_incoming_fault(struct pipes_struct *p)
1695 data_blob_free(&p->in_data.data);
1696 p->in_data.pdu_needed_len = 0;
1697 p->in_data.pdu.length = 0;
1698 p->fault_state = True;
1700 DEBUG(10, ("Setting fault state\n"));
1703 static NTSTATUS dcesrv_auth_request(struct pipe_auth_data *auth,
1704 struct ncacn_packet *pkt,
1708 size_t hdr_size = DCERPC_REQUEST_LENGTH;
1711 DEBUG(10, ("Checking request auth.\n"));
1713 if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
1717 /* in case of sealing this function will unseal the data in place */
1718 status = dcerpc_check_auth(auth, pkt,
1719 &pkt->u.request.stub_and_verifier,
1722 if (!NT_STATUS_IS_OK(status)) {
1727 /* remove padding and auth trailer,
1728 * this way the caller will get just the data */
1729 if (pkt->auth_length) {
1730 size_t trail_len = pad_len
1731 + DCERPC_AUTH_TRAILER_LENGTH
1733 if (pkt->u.request.stub_and_verifier.length < trail_len) {
1734 return NT_STATUS_INFO_LENGTH_MISMATCH;
1736 pkt->u.request.stub_and_verifier.length -= trail_len;
1739 return NT_STATUS_OK;
1742 /****************************************************************************
1743 Processes a request pdu. This will do auth processing if needed, and
1744 appends the data into the complete stream if the LAST flag is not set.
1745 ****************************************************************************/
1747 static bool process_request_pdu(struct pipes_struct *p, struct ncacn_packet *pkt)
1752 if (!p->pipe_bound) {
1753 DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
1754 set_incoming_fault(p);
1758 /* Store the opnum */
1759 p->opnum = pkt->u.request.opnum;
1761 status = dcesrv_auth_request(&p->auth, pkt, &p->in_data.pdu);
1762 if (!NT_STATUS_IS_OK(status)) {
1763 DEBUG(0, ("Failed to check packet auth. (%s)\n",
1764 nt_errstr(status)));
1765 set_incoming_fault(p);
1769 data = pkt->u.request.stub_and_verifier;
1772 * Check the data length doesn't go over the 15Mb limit.
1773 * increased after observing a bug in the Windows NT 4.0 SP6a
1774 * spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
1775 * will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
1778 if (p->in_data.data.length + data.length > MAX_RPC_DATA_SIZE) {
1779 DEBUG(0, ("process_request_pdu: "
1780 "rpc data buffer too large (%u) + (%u)\n",
1781 (unsigned int)p->in_data.data.length,
1782 (unsigned int)data.length));
1783 set_incoming_fault(p);
1788 * Append the data portion into the buffer and return.
1792 if (!data_blob_append(p->mem_ctx, &p->in_data.data,
1793 data.data, data.length)) {
1794 DEBUG(0, ("Unable to append data size %u "
1795 "to parse buffer of size %u.\n",
1796 (unsigned int)data.length,
1797 (unsigned int)p->in_data.data.length));
1798 set_incoming_fault(p);
1803 if (pkt->pfc_flags & DCERPC_PFC_FLAG_LAST) {
1806 * Ok - we finally have a complete RPC stream.
1807 * Call the rpc command to process it.
1811 * Process the complete data stream here.
1813 if (pipe_init_outgoing_data(p)) {
1814 ret = api_pipe_request(p, pkt);
1823 /****************************************************************************
1824 Processes a finished PDU stored in p->in_data.pdu.
1825 ****************************************************************************/
1827 void process_complete_pdu(struct pipes_struct *p)
1829 struct ncacn_packet *pkt = NULL;
1833 if(p->fault_state) {
1834 DEBUG(10,("RPC connection in fault state.\n"));
1838 pkt = talloc(p->mem_ctx, struct ncacn_packet);
1840 DEBUG(0, ("Out of memory!\n"));
1845 * Ensure we're using the corrent endianness for both the
1846 * RPC header flags and the raw data we will be reading from.
1848 if (dcerpc_get_endian_flag(&p->in_data.pdu) & DCERPC_DREP_LE) {
1849 p->endian = RPC_LITTLE_ENDIAN;
1851 p->endian = RPC_BIG_ENDIAN;
1853 DEBUG(10, ("PDU is in %s Endian format!\n", p->endian?"Big":"Little"));
1855 status = dcerpc_pull_ncacn_packet(pkt, &p->in_data.pdu,
1857 if (!NT_STATUS_IS_OK(status)) {
1858 DEBUG(0, ("Failed to unmarshal rpc packet: %s!\n",
1859 nt_errstr(status)));
1863 /* Store the call_id */
1864 p->call_id = pkt->call_id;
1866 DEBUG(10, ("Processing packet type %u\n", (unsigned int)pkt->ptype));
1868 switch (pkt->ptype) {
1869 case DCERPC_PKT_REQUEST:
1870 reply = process_request_pdu(p, pkt);
1873 case DCERPC_PKT_PING: /* CL request - ignore... */
1874 DEBUG(0, ("Error - Connectionless packet type %u received\n",
1875 (unsigned int)pkt->ptype));
1878 case DCERPC_PKT_RESPONSE: /* No responses here. */
1879 DEBUG(0, ("Error - DCERPC_PKT_RESPONSE received from client"));
1882 case DCERPC_PKT_FAULT:
1883 case DCERPC_PKT_WORKING:
1884 /* CL request - reply to a ping when a call in process. */
1885 case DCERPC_PKT_NOCALL:
1886 /* CL - server reply to a ping call. */
1887 case DCERPC_PKT_REJECT:
1888 case DCERPC_PKT_ACK:
1889 case DCERPC_PKT_CL_CANCEL:
1890 case DCERPC_PKT_FACK:
1891 case DCERPC_PKT_CANCEL_ACK:
1892 DEBUG(0, ("Error - Connectionless packet type %u received\n",
1893 (unsigned int)pkt->ptype));
1896 case DCERPC_PKT_BIND:
1898 * We assume that a pipe bind is only in one pdu.
1900 if (pipe_init_outgoing_data(p)) {
1901 reply = api_pipe_bind_req(p, pkt);
1905 case DCERPC_PKT_BIND_ACK:
1906 case DCERPC_PKT_BIND_NAK:
1907 DEBUG(0, ("Error - DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
1908 "packet type %u received.\n",
1909 (unsigned int)pkt->ptype));
1913 case DCERPC_PKT_ALTER:
1915 * We assume that a pipe bind is only in one pdu.
1917 if (pipe_init_outgoing_data(p)) {
1918 reply = api_pipe_alter_context(p, pkt);
1922 case DCERPC_PKT_ALTER_RESP:
1923 DEBUG(0, ("Error - DCERPC_PKT_ALTER_RESP received: "
1924 "Should only be server -> client.\n"));
1927 case DCERPC_PKT_AUTH3:
1929 * The third packet in an auth exchange.
1931 if (pipe_init_outgoing_data(p)) {
1932 reply = api_pipe_bind_auth3(p, pkt);
1936 case DCERPC_PKT_SHUTDOWN:
1937 DEBUG(0, ("Error - DCERPC_PKT_SHUTDOWN received: "
1938 "Should only be server -> client.\n"));
1941 case DCERPC_PKT_CO_CANCEL:
1942 /* For now just free all client data and continue
1944 DEBUG(3,("process_complete_pdu: DCERPC_PKT_CO_CANCEL."
1945 " Abandoning rpc call.\n"));
1946 /* As we never do asynchronous RPC serving, we can
1947 * never cancel a call (as far as I know).
1948 * If we ever did we'd have to send a cancel_ack reply.
1949 * For now, just free all client data and continue
1955 /* Enable this if we're doing async rpc. */
1956 /* We must check the outstanding callid matches. */
1957 if (pipe_init_outgoing_data(p)) {
1958 /* Send a cancel_ack PDU reply. */
1959 /* We should probably check the auth-verifier here. */
1960 reply = setup_cancel_ack_reply(p, pkt);
1965 case DCERPC_PKT_ORPHANED:
1966 /* We should probably check the auth-verifier here.
1967 * For now just free all client data and continue
1969 DEBUG(3, ("process_complete_pdu: DCERPC_PKT_ORPHANED."
1970 " Abandoning rpc call.\n"));
1975 DEBUG(0, ("process_complete_pdu: "
1976 "Unknown rpc type = %u received.\n",
1977 (unsigned int)pkt->ptype));
1983 DEBUG(3,("DCE/RPC fault sent!"));
1984 set_incoming_fault(p);
1985 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
1989 * Reset the lengths. We're ready for a new pdu.
1991 TALLOC_FREE(p->in_data.pdu.data);
1992 p->in_data.pdu_needed_len = 0;
1993 p->in_data.pdu.length = 0;